package com.backend.springstore.config;

import io.swagger.models.HttpMethod;
import org.springframework.context.annotation.Configuration;

import org.springframework.http.HttpStatus;

import org.springframework.web.method.HandlerMethod;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Configuration
public class CorsConfig implements Filter {
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        HttpServletRequest request = (HttpServletRequest) req;

        String origin = request.getHeader("Origin");

        if (origin != null) {
            response.setHeader("Access-Control-Allow-Origin", origin);
        }
        String headers = request.getHeader("Access-Control-Request-Headers");
        if (headers != null) {
            response.setHeader("Access-Control-Allow-Headers", headers);
            response.setHeader("Access-Control-Expose-Headers", headers);
        }

        response.setHeader("Access-Control-Allow-Methods", "*");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        if (request.getMethod().equals(HttpMethod.OPTIONS.name())) {
            response.setStatus(HttpStatus.NO_CONTENT.value());
        } else {
                chain.doFilter(req, response);
            }
        }
        @Override
        public void init (FilterConfig filterConfig){

        }

        @Override
        public void destroy () {

        }
}
